Production of perforated strips.



T A. EDISON.

PRODUCTION OF PEBPOBATED STRIPS.

Arrmommx rum) JULY 1, 1910.

Patented Jan. 6, 1914.

8 SHEETS-SHEET 1.

T. A. EDISON.

PRODUCTION OF PBRPORATBD STRIPS.

APPLICATION FILED JULY 1, 1910.

1,083,353. Patented Jan. 6,1914.

2 sums-sum 2.

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THOMAS A. EDIsoN; 0 LLE'WE'LIJYN PARK, WEST ORANGE, NEW JERSEY, ASSIGNOR'ro EDISON STORAGE-BATTERY COMPANY, or WEST ORANGE, NEW JERSEY, A con-PORATION or NEW JERSEY".

PRODUCTION or PEEEORATEE STRIPS.

Application-filedluly'l, 1910; Serial No. 569,848.

pockets to contain theactive" material instorage batteries. Patent No.870,024 was granted to me November 5, 1907 upon an apparatus for Thestrips pro need by this'inven'tion were perforated by a pairofcgfiiperating perforating rolls between which the strip was passed. Ihave found that objectionable burs are formed around each of the minuteperforations produced by this operation, which burs somewhat obstr-uetthe openings of the perforations, and also make the surface of the stripwhich forms the inner surface of the finished pocket in thestoragebattery too rough. Accordingly, I now propose to grind down theseburs to open the perforations sufiiciently and also to reduce theroughness of the surface of the strips.

Accordingly, the objects of my invention are to produce an improvedprocess for making perforated strips, includin as astep the grinding offof the ends of t e burs produced as above described, and also theprovision of an improved apparatus by which the process step abovereferred to may be efficiently carried out.

Reference is hereby made to the accompanying drawings forming part ofthis specification, wherein the same numerals are used to designatecorresponding parts in the several views, and in which Figure 1represents in side elevation, mechanism for continuously grinding ofithe burs from the surface of the perforated strip, by which mechanismthegrinding step of my improved process may be carried out. Fig. 2represents a cross section on line 22 in Fig. 1, parts being shown inelevation. Figs. 3 and 4 represent enlarged sections through theperforated strip before and after grinding respectively, and Fig. 5 is aperspective side elevation of the perforated and ground strip.

Specification of Letters Patent.

roducing perforated strips' Patented Jan. 6, 1914.

Referring now to the'drawings, the strip 1 is fed from-the supply reel 2past the emery Wheel or similar grinding device 3 andronto take-up reel4, the strip passing overidler- 5 which is mounted in proximitytogrinding-wheel 3. Idler 5 is mounted in.

aframe 6-whichis preferably in the form oi a" hopper and which isadapted to be moved towardandaway from emery wheel 3 in order to adjustthe position of perforated strip 1 with respect to the grinder toregulate-the amount .of material taken off from the'strip by thegrinder, The hopper-like form of the frame 6 serves to confine andcollect the abraded mate-rial- Frame 6 is fed toward and away from thegrinder by means of the device shown diagrammatically at'7, which maycomprise a screw and nut or equivalent deviceoperated by handle 6.The'strip is fed by means of toothed roller 9, the strip passingbetweenthe same and asmooth-roller 10. Roller 9 is mounted in bracket 11carried by the frame 12 of the machine. Roller 10 is-carried by bracket13 pivotally mounted at 14 upon frame 12, screw 15 extending throughbracket 13 and bearing upon frame 12, being adapted-by its movement tocause bracket 13 to rock about pivot 14. to adjust the position ofroller 10 with respect to roller 9; Grinder 3 is driven by belt or chainconnection 16 and the shaft of roller 9 by chain 17 takeup reel 4 beingrotated from the shaft of purpose is illustrated in Fig. 2. As hereshown, the chain 18 passes over the sprocket 19 which is mounted upon afriction member 20, which revolves upon shaft 21 upon which reel 4 issecured. Friction member 20 is forced into frictional contact withcooperating friction device 22 secured upon shaft 21 by means of Spring23. Accordingly, shaft 21 and reel 4 are'driven frictionallyby thedevices described from chain 18 so that as the, diameter of the roll offilm upon reel 4 increases and the peripheral speed thereof increasesover that of feeding roller 9, fricconsiderably widened thereby,as'shown in Fig. 4. The appearance of the finished strip is indicated byHaving now I claim is 1. In apparatus of the character described, incombination, a grinder, and means for continuously feeding a striphaving ends and of perforated material ast said grinder Fig. 5.described my invention, what a to reduce-the burs surroun ing theperforations on one side of the strip, substantially as described.

2. In apparatus of the character described, in combination, a grinder, asupply reel, a take-up reel, means for uniformly progressing a strip ofperforated material from said supply reel past said grinder and, ontosaid ta e-up reel, and means for adjusting the position of the portionof said strip passin said grinder with respect to said grinder, sustantially as described.

3. In apparatus of the character described, in combination, a grinder,and means for continuously feeding a strip of perforated noeeteeematerial past said grinder to reduce the burs surrounding theperforations on one side of the strip and including a hopper adjustablerelatively to the grinder, said hopper having means mounted therein forpressing the strip against thegrinder, substantially as described.

4. In apparatus of the character described, in combination, a grinder,and means for continuously feeding a strip having ends and ofperfor'atedmaterial ast sa d grinder to reduce the burs surroun ing theperforations on one side of the strip and including an adjustable rollerfor pressin the strip against the grinder, substantia 1y as described. I

5. In apparatus of the character described, in combination, a grinder,means for continuously feeding a strip of perforated material past saidgrinder to reduce the burs surrounding the perforations on one side ofthe stri and including a take-u reel, and means or driving the saidfeeding means, the said take-up reel having a frictional connection withsaid driving 'means, substantially as described.

,. This specification signed "and witnessed '80 this 30th day of June1910.

THOS. A. EDISON.

Witnesses:

DYER SMITH, FRANK 1D. Lawns.

